package com.example.secondhand.controller;

import com.google.code.kaptcha.impl.DefaultKaptcha;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.CrossOrigin;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import javax.imageio.ImageIO;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.awt.image.BufferedImage;
import java.io.IOException;

@CrossOrigin
@RestController
@RequestMapping("/captcha")
public class CaptchaController {

    @Autowired
    private DefaultKaptcha defaultKaptcha;

    @GetMapping("/get")
    public void getCaptcha(HttpServletRequest request, HttpServletResponse response) throws IOException {
        response.setDateHeader("Expires", 0);
        response.setHeader("Cache-Control", "no-store, no-cache, must-revalidate");
        response.addHeader("Cache-Control", "post-check=0, pre-check=0");
        response.setHeader("Pragma", "no-cache");
        response.setContentType("image/jpeg");

        String capText = defaultKaptcha.createText();
        request.getSession().setAttribute("captchaCode", capText);

        BufferedImage bi = defaultKaptcha.createImage(capText);
        try (ServletOutputStream out = response.getOutputStream()) {
            ImageIO.write(bi, "jpg", out);
        }
    }
}
